BDM7
Alloy Type: HARDFACING Core, Bare, and Coated Electrodes
BDM7 is a tubular wire for gas shielded metal arc hardsurfacing giving a tough high speed steel deposit. It has exceptional wear resistance in cold cutting operations. BDM7 keeps its properties to 600°C. Hardness may be increased to around 65 HRc by tempering.
Applications: BDM7 is used for hardfacing components subject to metal-to metal under conditions of moderate impact. Examples: Machining tools, cold shearing blades, milling cutters, knives and wire guides.
| AWS Class:
N/A |
Classification
EN 1470 T Fe4 DIN 8555: MSG 3-GF-60-GPST |
Welding Positions: Flat, Half up, Half down
Typical All-Weld Metal Analysis (single values are maximum)
| C | Mn | Si | Cr | Mo | V | W |
| 1.11 | 0.5 | 0.5 | 5.0 | 7.5 | 1.1 | 2.2 |
Structure: martensite + carbines
TYPICAL ALL-WELD METAL MECHANICAL PROPERTIES
Hardness-3-layer deposit on mild steel; 57-63 HRc
CONDITIONS OF USE
| Current Type | Shielding Gas | |
| M12: Ar + 2 to 5% CO2 | ||
| DC (+) | EN 439 | M13: Ar + 1 to 3% O2 |
| M21: Ar + 5 to 25% CO2 | ||
Gas flow rate: 30 – 40 cfh (15 – 20 I/min)
| Amperage A | Voltage V | Stick-out | ||||
| Diameter | Range | Optimum | Range | Optimum | Range | Optimum |
| 0.045 (1.2mm) | 100-300 | 220 | 18-33 | 28 | 5/8″- 1-1/4″ (15mm-30mm) | 3/4″ (20mm) |
| 1/16″ (1.6mm) | 150-350 | 280 | 22-33 | 28 | 5/8″ – 1-1/4″ (15mm-30mm) | 1″ (25mm) |
Recovery: 95%
Standard Diameters: 0.045” (1.2mm), 1’16” (1.6mm)
Weight: 33lb spool